File:Pangaea continents.svg|thumb|Map of Pangaea with modern continental outlines.
'''Pangaea''' or '''Pangea''' (
[[http://www.oxforddictionaries.com/definition/english/pangaea Oxford Dictionaries]]
) was a supercontinent
that existed during the late Paleozoic
and early Mesozoic
It assembled from earlier continental units approximately 300 million years ago, and it began to break apart about 175 million years ago.
In contrast to the present Earth
and its distribution of continental mass, much of Pangaea was in the Southern Hemisphere|southern hemisphere
and surrounded by a super ocean, Panthalassa
. Pangaea was the last supercontinent to have existed and the first to be reconstructed by geologists.